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Posts by Dr. Stéphanie Juneau

An image of the entire Earth, with Northern Africa and the North Pole visible at the lower left. It looks like daytime but it is actually illuminated by moonlight. There’s a bright arc along the lower right where the sun is coming through from behind. There’s a bright dot on the lower right (Venus) and a glow (zodiacal light). A few stars can be seen in the dark beyond the Earth.

An image of the entire Earth, with Northern Africa and the North Pole visible at the lower left. It looks like daytime but it is actually illuminated by moonlight. There’s a bright arc along the lower right where the sun is coming through from behind. There’s a bright dot on the lower right (Venus) and a glow (zodiacal light). A few stars can be seen in the dark beyond the Earth.

An image of the entire Earth, with Northern Africa and the North Pole visible at the lower left. It is dark with muted colors. There’s a very bright arc along the lower right where the sun is coming through from behind. There’s a small dot on the lower right (Venus). The background is dark with a few faint stars visible.

An image of the entire Earth, with Northern Africa and the North Pole visible at the lower left. It is dark with muted colors. There’s a very bright arc along the lower right where the sun is coming through from behind. There’s a small dot on the lower right (Venus). The background is dark with a few faint stars visible.

The whole-Earth-at-night photo from the #Artemis II mission was brighter than many expected. That was mostly due to camera settings; here’s another pic taken just before with diff settings. Digital photography is always subjective—even before processing! (HT @swapnakrishna.com @jasonc0.bsky.social)

2 weeks ago 2282 485 55 35
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Dr. John Wu, PhD, Associate Astronomer and the Applied AI Scientist at the Space Telescope Science Institute, presenting his talk "Short Stories of AI in, and for, Astronomy" at our hybrid seminar series!

To sign up for future seminars, join our email list cosmicai.org/get-involved

2 weeks ago 3 2 0 0
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It’s official, our panel "Revolutionizing Astronomy with Next Generation Big Data" has been accepted to @sxsw.com 2026! Thank you to everyone who supported our work!
Panelists: Stella Offner, Paul Torrey, @stephajuneau.bsky.social, & @niall2.bsky.social
Learn more schedule.sxsw.com/events/PP116...

5 months ago 7 3 0 0
Woman disguised as a Frida Kahlo self-portrait with make-up, crown of flowers, hand-shaped earrings and with a wooden picture frame hanging around the head and neck. Background is a brick wall.

Woman disguised as a Frida Kahlo self-portrait with make-up, crown of flowers, hand-shaped earrings and with a wooden picture frame hanging around the head and neck. Background is a brick wall.

Same as previous except with a different background. Woman disguised as a Frida Kahlo self-portrait with make-up, crown of flowers, hand-shaped earrings and with a wooden picture frame hanging around the head and neck. Background is the actual painting with foliage and dark clouds within the frame and just plain green and white outside the frame, giving the impression that the Frida portrait is coming to life.

Same as previous except with a different background. Woman disguised as a Frida Kahlo self-portrait with make-up, crown of flowers, hand-shaped earrings and with a wooden picture frame hanging around the head and neck. Background is the actual painting with foliage and dark clouds within the frame and just plain green and white outside the frame, giving the impression that the Frida portrait is coming to life.

Dressed as Frida Kahlo with the background from her painting: "Self portrait dedicated to Dr. Eloesser"

Dressed as Frida Kahlo with the background from her painting: "Self portrait dedicated to Dr. Eloesser"

Original painting by Frida Kahlo: "Self portrait dedicated to Dr. Eloesser" used as a reference for the recreation

Original painting by Frida Kahlo: "Self portrait dedicated to Dr. Eloesser" used as a reference for the recreation

In honor of Frida Kahlo, her mesmerizing work, her inspiring strength and her impactful journey 💚

#halloween #Frida #art #painter

5 months ago 42 5 4 0

The first annual Astro Data Lab user survey closes tomorrow, September 30. If you haven’t already, please fill it out to help shape the future of the Data Lab!

👉 User Survey: datalab.noirlab.edu/usersurvey

#astronomy 🔭

6 months ago 3 1 0 0
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Exciting news! Introducing AstroVisBench: A Code Benchmark for Scientific Computing and Visualization in Astronomy!

A new benchmark developed by researchers at the NSF-Simons AI Institute for Cosmic Origins is testing how well LLMs implement scientific workflows in astronomy and visualize results.

6 months ago 10 4 1 3
A pen sketch of a web page for an astronomer, showing name, email, optional phone number, and professional contact details, with a one sentence summary of their research and an ADS link.

A pen sketch of a web page for an astronomer, showing name, email, optional phone number, and professional contact details, with a one sentence summary of their research and an ADS link.

My periodic reminder for #astrosci #astrodon #exoplanets Early Career Researchers to please, please, please have a simple web site with your current email address on it - rationale here: kenworthy.space/advice/

7 months ago 73 31 1 3

If you have a few mins and have used (or you're thinking about using) the Astro Data Lab, our team would love to hear from you!

7 months ago 3 1 0 0
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PanelPicker | SXSW Conference & Festivals PanelPicker® is the official SXSW user-generated session proposal platform. Enter ideas and vote to help shape Conference programming for SXSW and SXSW EDU.

Vote to bring our panel “Revolutionizing Astronomy + AI with Next Generation Big Data” to SXSW! Register for a SXSW account & vote by clicking the heart ❤️ - open now til Aug 24!
participate.sxsw.com/flow/sxsw/sx... @stephajuneau.bsky.social @niall2.bsky.social

8 months ago 4 5 0 2
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Ah! indeed ☺

1 year ago 0 0 0 0

Yay! Now I'm allowed to reveal that DESI found stronger constraints toward evolving dark energy. It's not quite at the five sigma level yet but may have "major implications for our understanding of the nature and fate of our universe" 🚀🔭

1 year ago 8 2 0 0
Montage with photos of the Mayall 4-meter telescope and a selfie in front of it.

Montage with photos of the Mayall 4-meter telescope and a selfie in front of it.

Portrait of astronomer Stephanie Juneau in front of the Mayall telescope dome in the background. By photographer Jesse Rieser

Portrait of astronomer Stephanie Juneau in front of the Mayall telescope dome in the background. By photographer Jesse Rieser

🔭 OK so I'm not allowed to reveal the details yet but we have some exciting press releases coming up in a few hours (watch this space:
@desisurvey.bsky.social) including a data release that I've been working on for MONTHS and I'm just here on the verge of tears 😭

#astronomy #data #treasure

1 year ago 18 2 0 0

🔭 Crowdsourcing here a little: Astro folks! Do you have a favorite online resource/publication for astronomy info to share with the general public?

I have a science museum volunteer who's interested in updating the sources they share with folks who want to learn more, and astrobites is my default

1 year ago 9 4 4 0

We can't make @astropy.org better for you without knowing a bit about what you need and who you are. Tell us!

The Astropy Project will make informed decisions with your input. 🔭🧪

1 year ago 16 10 0 0
Image by Michael Carroll illustrating the sizes of some asteroids in 2013. The asteroids are shown in comparison to a US football field. We had seen the big one coming, and it just buzzed Earth. But the littler one we did NOT see coming, and it hit Earth above Chelyabinsk, creating a shockwave the blew out windows and injuring more than 1400 people.   The asteroid we are monitoring now - 2024 YR4 - is bigger than the little guy, but maybe as large as the whole football field!   Our JWST measurements next month will help pin down the size.   Source: https://carrollspaceart.com/gallery/comparisons/

Image by Michael Carroll illustrating the sizes of some asteroids in 2013. The asteroids are shown in comparison to a US football field. We had seen the big one coming, and it just buzzed Earth. But the littler one we did NOT see coming, and it hit Earth above Chelyabinsk, creating a shockwave the blew out windows and injuring more than 1400 people. The asteroid we are monitoring now - 2024 YR4 - is bigger than the little guy, but maybe as large as the whole football field! Our JWST measurements next month will help pin down the size. Source: https://carrollspaceart.com/gallery/comparisons/

Image by Michael Carroll shows some asteroids to scale. We did NOT see the little one coming & it hit Earth above Chelyabinsk in 2013, injuring >1400 people. Asteroid 2024 YR4 is bigger than the little one, perhaps as large as the football field! JWST 🔭 data next month will help pin down the size.

1 year ago 125 32 10 3
Cosmoview Episode 94: DESI Uncovers 300 New Intermediate-Mass Black Holes Plus 2500 New Active Bl...
Cosmoview Episode 94: DESI Uncovers 300 New Intermediate-Mass Black Holes Plus 2500 New Active Bl... YouTube video by NOIRLabAstro

And the fun video showcasing the @desisurvey.bsky.social data leading to Raga's findings

youtu.be/C-ZY6cCodoY?...

1 year ago 3 0 0 0
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DESI Uncovers 300 New Intermediate-Mass Black Holes Plus 2500 New Active Black Holes in Dwarf Galaxies - The Dark Energy Spectroscopic Instrument discovers a treasure trove of active black holes in dw... Within the Dark Energy Spectroscopic Instrument’s early data, scientists have uncovered the largest samples ever of intermediate-mass black holes and dwarf galaxies hosting an active black hole, more ...

Excited about this press release on Raga's great work finding elusive intermediate-mass black holes in galaxies! This project started during her PhD. Nice to see it come to fruition & also a glimpse of what the future holds with now much more DESI data in hand 🤩🔭

noirlab.edu/public/news/...

1 year ago 15 4 1 0
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DESI Uncovers 300 New Intermediate-Mass Black Holes Plus 2500 New Active Black Holes in Dwarf Galaxies - The Dark Energy Spectroscopic Instrument discovers a treasure trove of active black holes in dw... Within the Dark Energy Spectroscopic Instrument’s early data, scientists have uncovered the largest samples ever of intermediate-mass black holes and dwarf galaxies hosting an active black hole, more ...

Got truncated... Will repost. Thanks!!! Should have been noirlab.edu/public/news/...

1 year ago 1 0 0 0
NOIRLab Newsletter 2025/01

✨January 2025 updates✨

- Added 6 datasets: Palomar Gattini-IR (PGIR) DR1, S-PLUS DR4, DES Y6 Gold, PHAT v3, DeMCELS DR1, SDSS DR12 stellar mass VACs

- Added 4 Jupyter notebooks to our collection available to all users and on GitHub

Read more in our Newsletter! datalab.noirlab.edu/newsletters/...

1 year ago 1 1 0 0

Very proud of Isabella's work which she started during a TIMESTEP internship at NOIRLab last summer. She wrote a very nice Jupyter notebook on galaxy quenching featuring the SDSS "cosmic slime" estimates of matter density. Check out her #aas245 iPoster 465.04 (notebook linked in short thread below)

1 year ago 2 0 0 0
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🔎 #AAS245 Scavenger Hunt 🔍

ngVLA antennas are hidden around the conference center!

Find one? Take it home, and don’t forget to tag us @thenrao.bsky.social! (@thenrao on all socials)

#RadioAstronomy 📡

1 year ago 25 4 4 0
This is an image from JWST’s NIRCam (Near-Infrared Camera). It features the star-forming region NGC 604 and shows how stellar winds from bright, hot, young stars carve out cavities in surrounding gas and dust. The most noticeable features are tendrils and clumps of emission that appear bright red, extending out from areas that look like clearings, or large bubbles in the nebula.

This is an image from JWST’s NIRCam (Near-Infrared Camera). It features the star-forming region NGC 604 and shows how stellar winds from bright, hot, young stars carve out cavities in surrounding gas and dust. The most noticeable features are tendrils and clumps of emission that appear bright red, extending out from areas that look like clearings, or large bubbles in the nebula.

🧵
1/
For those who missed it, this is the stunning image from Webb's NIRCam showing NGC 604, a star-forming region located around 2.73 Mly away in the Triangulum galaxy (M33).

Source and more➡️ science.nasa.gov/missions/web...

Credits: NASA, ESA, CSA, STScI

🔭 🧪 #extragalactic #NASAWebb #JWST

1 year ago 408 50 4 0
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When bacteria was found on an asteroid Ryugu grain in London, the media questioned whether terrestrial contamination was ever avoidable. No contamination has been found at JAXA. But let's take a look at what that takes... brace yourself (my latest on Cosmos 🧪🔭🛰️)
👉 cosmos.isas.jaxa.jp/keeping-out-...

1 year ago 55 12 2 1
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Update: Mars came back from the other side 🔭🌝

#mars #occultation

1 year ago 3 0 0 0
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Last minute decided to check the Mars occultation time and rushed outside with new camera lens. Can you spot Mars just before it was occulted by our beautiful Moon? 🌝 🔭

1 year ago 2 1 1 0

Folks attending #aas245 this week, come by the NOIRLab booth to chat with some of my colleagues and get a live demo! 🔭

@noirlabastro.bsky.social

1 year ago 0 0 0 0

I think you might present in the same session as Isabella Olin, a student working with me on galaxy quenching. Sadly, I won't be attending but it'd be great if you two get to meet! I'll send you a note about your paper as well. Interesting stuff! ✨

1 year ago 1 0 1 0
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Donate to Help JPL & Roman & HabWorlds teammates in Pasadena, organized by Jason Tumlinson We are raising money to assist friends of ours who are displaced or… Jason Tumlinson needs your support for Help JPL & Roman & HabWorlds teammates in Pasadena

The gofundme for affected astronomers has been expanded to cover ALL astronomers who have been impacted by this fire. We're at $33k and still going, so if you were on the fence, please think about donating!
www.gofundme.com/f/support-na...

1 year ago 9 7 1 1

We've just released the third band of the Rapid ASKAP Continuum Survey! This is the new #RadioAstronomy reference survey of the sky, south of declination 40 degrees.

Here are some typical images...

@sunmish.bsky.social @elenchically.bsky.social @cosmicpudding.bsky.social @redqso.bsky.social

1 year ago 20 3 1 0
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Astronomy Feeds Moderator Applications Apply now to help run the Astronomy feeds! The plan is that moderators will handle things like feed sign ups and the (rare) cases when account / post moderation is necessary on the feeds. Handling s...

The Astronomy feeds are looking for more moderators! 🔭

Please consider signing up if you'd like to help sustain the health of our community here, especially while Bluesky grows. Apply below:

We also could benefit from anyone willing to help with development - DM @emily.space if you'd like to!

1 year ago 180 33 5 3